Iskanje po katalogu digitalne knjižnice

Opis: The low-carbon development strategy and ecological awareness of a combined heat and power (CHP) plant is the key factor that enables further development of such systems. CHP plants are subject to rigid European ecological guidelines, which dictate the pace of development of global thermal power engineering. For this purpose, the European Union issued a special Directive for the promotion of heat and power cogeneration, and is established with the best available technology (BAT) method. Even though the production of electricity using carbon-free technologies is on the rise, the production of electricity by fossil fuel combustion cannot be avoided completely. The meaning of the operation of the CHP plant is reflected particularly in the provision of tertiary services to the electric power system, regulation of the network frequency, particularly in winter months, when electricity production using carbon-free technologies is limited. In CHP systems, the low-carbon future is linked intricately to high investment costs and these impacts the final price of energy. Using the BAT method, the article presents the advantages of energy production in a combined heat and power plant, an example of the restructuring of a larger CHP system into a low-carbon plant and guidelines for further development.
Ključne besede: alternative facilities, best available technology, combined plant, heat recovery, hydrogen, low-carbon, methanisation, natural gas, steam recovery
Objavljeno v DKUM: 26.10.2023; Ogledov: 331; Prenosov: 5
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Opis: Digitalization and additive manufacturing offer new possibilities in the manufacturing of individualized medical and dental products. In the paper we present the results of the first 30 consecutive growing patients (15 males and 15 females), with a mean age of 13.69 years (SD = 1.26), who were treated for mandibular retrognathia (skeletal Class II malocclusion), using fixed sagittal guidance (FSG) appliance, individually manufactured by selective laser melting (SLM). Lateral cephalometric radiographs were taken before (T0) and after (T1) treatment and a detailed cephalometric analysis was performed. with a special focus on a time period for malocclusion correction. The analyzed data were compared with the control group (CG; treated with intermaxillary Class II elastics) that was matched for pretreatment age and pretreatment cephalometric measurements. Both methods were effective in the correction of Class II malocclusion, but the time period of correction was significantly shorter (16.03 ± 1.09 months vs. 20.65 ± 4.12 months) with the FSG appliance. After treatment visual skeletal and dentoalveolar effects were achieved, with statistically significant differences measured in mandibular incisors inclination (0.45° in FSG and 2.84° in CG) and distance (−0.61 mm in FSG and 0.13 mm in CG), in mandibular first molar inclination (−1.07° in FSG and 1.18° in CG) and overbite (−3.82 mm in FSG and −2.46 mm in CG), all in favor of FSG appliance. After the final mean treatment time of 16.03 ± 1.09 months, visual skeletal and dentoalveolar effects were achieved, with significant differences in sagittal (SNB angle, SNPg angle, mandibular length (CoGn) and consequently decrease in ANB angle) as well as in vertical (lower anterior facial height (LAFH) and gonial angle) measurements noted, with no reported complications. As the time needed for malocclusion correction was comparable with the reports in the traditional use of the functional appliance and as all the cosmetical and functional changes in all the treated patients remained stable after a 2-year observational period, growing patients with Class II malocclusion could benefit with this type of treatment. As all the cosmetical and functional changes in all the treated patients remained stable after a 2-year observational period, growing patients with Class II malocclusion could benefit from the treatment with FSG appliance.
Ključne besede: selective laser melting, individualized manufacturing technology, mandibular retrognathia
Objavljeno v DKUM: 18.09.2023; Ogledov: 513; Prenosov: 26
Celotno besedilo (1,80 MB)
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Opis: Cybercrime is one of the most significant security challenges of the 21st century. However, official statistics do not provide insights into its prevalence and nature. Representative cross-sectional field studies may help fill this gap, focusing on differences between urban and rural technology users. We (a) investigated the association between the purpose of computers and other electronic device usage and perceived vulnerability, (b) compared the differences in the purpose of computers or other electronic device use and perceived vulnerability, and (c) compared the perceived cyber victimization between residents of rural and urban areas. We conducted a field study that resulted in a representative sample of the Republic of Slovenia in Europe. We found several significant differences in the purpose of technology use and perceived cyber victimization. Furthermore, the results indicate that the purpose of technology use is somehow associated with perceived vulnerability in cyberspace; however, such associations are different in cyberspace than in the material world.
Ključne besede: cyber victimization, cybercrime, rural environment, technology use, perceived vulnerability
Objavljeno v DKUM: 31.07.2023; Ogledov: 413; Prenosov: 54
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Opis: Introduction: Poor adoption of electronic health records among healthcare workers can diminish their impact. Healthcare informatics solutions development should diligently acknowledge end-user needs.This study compares a user experience and perceived quality of the nursing process integration in two different applications for electronic documentation of the nursing care plan. Both applications were designed and tested in Slovenia. Methods: In the first phase, final year undergraduate nursing students were recruited (n=73) and randomly assigned into two groups. Each group used one of the applications for a duration of five hours. A survey among students was conducted. In the second phase, additional students were recruited (n=40) and invited to participate in qualitative analysis of the unfavourably rated application. Results: The modern, visually improved application was favourably rated by students in terms of all aspects of application usability. However, students reported a significant number of inadequacies regarding the nursing process methodology integration. On the contrary, the students using the poorly rated and visually outdated application reported no such concerns. Qualitative analysis of student reflections identified additional positive features of software design that were not detected in survey results analysis. Conclusion: This study showed that a user-centred approach can be used to compare diverse electronic solutions. Detected discrepancies in findings using qualitative and quantitative analysis show the importance of integrating diverse research approaches for adequate evaluation of software solutions. Furthermore, this study design promotes empowerment of healthcare workers to participate in the development and critical evaluations of software solutions.
Ključne besede: nursing process, information technology, documentation, user experience, quantitative/ qualitative approach
Objavljeno v DKUM: 12.07.2023; Ogledov: 494; Prenosov: 42
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Opis: Background and purpose: Despite their clear relevance to human life, microchip implants are still widely viewed as negative, threatening our privacy and raising growing concerns about our health. This paper aims to investigate the important factors influencing people’s perception of microchip implants and their willingness to use them for different purposes. Methodology: The cross-sectional study was conducted in three European countries and the data were analysed using the group Structural Equation Modeling approach. Only complete answers to the online survey questionnaire items were used representing a convenience sample of 804 respondents. Results: The results show that perceived ease of use, usefulness and perceived trust are significant predictors of intention to use microchip implants. Perceived trust is influenced by privacy and technology safety. Concerns about painful procedures and other health concerns reduce the perceived usefulness of microchip implants. Apart from the predictor health concerns, the results were similar in all countries. Conclusion: Based on the presented results, researchers interested in investigating the actual use of microchip implants can establish a solid foundation for their research. The results may assist policy makers in developing the regulations to ensure the safe use of microchip implants and allow for a higher level of security. As a follow-up, investigation of changes in the acceptance of microchip implants following the threat of a global pandemic is proposed.
Ključne besede: microchip implant, near field communication, behavioural intentions, structural equation model, technology acceptance model
Objavljeno v DKUM: 15.09.2022; Ogledov: 582; Prenosov: 22
Celotno besedilo (1,04 MB)
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